The Fifth Doctor + Adric, Mathematical Genius
Produces: Infinite +1/+1 counters on certain creatures, Infinite mana creatures you control can produce except ones that attacked or entered the battlefield this turn, Infinite untap of creatures you control except ones that attacked or entered the battlefield this turn
- Color identity
- WU
Prerequisites
You control creatures that together can tap for at least {2}{U} and didn't attack or enter this turn. Adric didn't enter this turn.
Steps
- At the beginning of your end step, The Fifth Doctor triggers.
- Holding priority, activate mana-producing creatures you control by tapping them, adding at least {2}{U}.
- Activate Adric's first ability by paying {2}{U} and tapping them, copying the Fifth Doctor's trigger.
- Resolve the copied triggered ability, untapping all creatures you control that didn't enter or attack this turn and putting a +1/+1 counter on each them.
- Repeat from 2.
How to execute this combo
The "The Fifth Doctor + Adric, Mathematical Genius" combo takes 5 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.
The end result: Infinite +1/+1 counters on certain creatures, Infinite mana creatures you control can produce except ones that attacked or entered the battlefield this turn, Infinite untap of creatures you control except ones that attacked or entered the battlefield this turn.
Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.
The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.